This is an older article (from 2013).
Here's a link to the pdf from the researcher's page at Tulane.
http://tulane.edu/sse/eebio/people/c...-al-2013-2.pdf
It had been discussed on another forum (in 2013) and it was suggested (by Allen Repashy) that the reported media carotenoid content could be approximated by adding 5% SuperPig to the media.
James